package string;

public class StringAndStringBuilderDemo {
    public static void main(String[] args) {
        String str = "a";
//        for(int i = 0;i<1000000;i++){
//            str=str+"a";
//        }

        //StringBuffer
        StringBuilder builder = new StringBuilder("a");
        for(int i = 0;i<1000000;i++){
            builder.append("a");
        }
        System.out.println("执行完毕");
    }
}
